Improvement in blind-splint machines



l a wedge, C.

UNITEDL STATES PATENT OFFICE.

J. A. WELSH, OF XENIA, OHIO.

IMPROVEMENT IN BLIND-SPLINT MACHINES.

Specification forming part of Letters Patent No. 52,473, dated February6,. 1866.

To all whom it may concern:

Be it known that I, J. A. WELSH, of Xenia, Greene county, in the Stateof Ohio, have invented certain new and useful Improvements in Tools forCutting Splints for Window- Shades and'Similar Uses; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon, making part of this specification,similar letters in both figures referring to like parts.

Figure lis a longitudinal vertical section, and Fig. 2 a transversevertical section of the same, takenon the line fr x of Fig. 1.

The nature of my invention consists in proriding an adjustablethroat-piece, having a roller mounted in its lower end immediately overthe point of the knife, and using, in connection therewith, a spring andadjustingscrews. l,

To enable others skilled in the art to construct and use my improvedtool, I will proceed to describe it.

A represents the body of the tool, which is constructed of wood, in theusual manner, having the sides projecting down below the body, andleaving a channel on its under side of the width of lche splint to becut, as shown clearly in Fig. 2.

A plane bit or knife, I), is secured in the rear portion of theimplement inanv inclined position, and havingits point projecting downintothe channel about midway of its length, as shown in Fig. l, achannel being formed above the knife for the splint to pass through ascut. This knife Dis secured in place by Ihe front portion of the tool isrecessed and provided with an adjustable block, B, to regulate thethickness of the splint to be cut. At the rear of block B and directlyover the point of the knife D, Illocate an adjustable block or frame, E,having a roller, c, mounted in its lower end transversely ofthe body A.Upon the top of this frame E, I place arubber spring, a, and upon theupper surface of which rests a metal plate, against which the end of ascrew, b, presses. By this screw b the frame E, with its roller c, canbe adjusted higher or lower, and thus made to press upon the splint overthe point of the knife with more or less force, as may desired.

A screw, d, is also inserted in the projecting sides or lianges of thetool, so as to impinge against the under side of the knife near itspoint, to prevent its springing, and also to assist in adjusting it asmay be necessary.

The object of the friction-roller is to prevent the'grain of the splintfrom being injured or broken, as it is apt to be when it has to slidepast a stationary piece, as is usual in tools of this character. Thereis also-less friction, and consequentlyT less power is required tooperate it. By the use of the spring a the adjustable block or frame Eis allowed to yield slightly when there is a curl or knot in the wood,and thus prevent the splint from sticking in the throat and becomingbroken and choking the tool.

By these improvements I am enabled to furnish a tool that performs itswork with great ease and perfection.

Having thus described my improvements, what I claimis- 1. The slidingblock E, provided with the roller c, arranged and operating as shown anddescribed.

2. The spring a, and set-screw b, in combination with the movable blockE and roller c, arranged and operating in the manner and for thepurposes set forth.

J. A. WELSH.

Witnesses:

W. LE ROY, Lnwis W. BABB.

